Linked Life Data

2480534

Source:http://linkedlifedata.com/resource/pubmed/id/2480534

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1990-1-25
pubmed:abstractText
Alterations in the metabolism of monoamine neurotransmitters have been proposed to be involved in the development of the hepatic encephalopathy (HE) associated with experimental and human liver failure. In order to evaluate this hypothesis, the monoamines and some of their metabolites were measured in homogenates of caudate nucleus (CAU), prefrontal (PFCo) and frontal cortex (FCo) dissected from brains obtained at autopsy from nine cirrhotic patients who had died in hepatic coma and an equal number of control subjects, free from neurological, psychiatric and hepatic disorders, matched for age and time interval from death to freezing of autopsied brain samples. Monoamine measurements were performed by high-performance liquid chromatography with ion-pairing and electrochemical detection after a simple extraction procedure. In all three regions investigated, concentrations of dopamine (DA) were unchanged in cirrhotic patients vs controls while its metabolites, 3-methoxytyramine (3-MT) and homovanillic acid (HVA) were selectively affected i.e. 3-MT was found to be increased in CAU, while HVA levels were increased in FCo and CAU. DOPAC was also found to be unchanged in CAU. Noradrenaline (NA) levels were greatly increased in PFCo and FCo of cirrhotic patients but remained unchanged in CAU. No significant differences in the concentrations of either serotonin (5-HT) or of its precursor 5-hydroxytryptophan (5-HTP) were found in any of the three regions studied. However, 5-hydroxyindoleacetic acid (5-HIAA), the major metabolite of 5-HT, was increased in PFCo and CAU of cirrhotic patients. These findings show that selective alterations of catecholamine and 5-HT systems are involved in human HE and therefore, they may play an important role in the pathogenesis of certain neurological symptoms associated with this encephalopathy.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0364-3190
pubmed:author
pubmed:issnType
Print
pubmed:volume
14
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
853-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Monoamines and metabolites in autopsied brain tissue from cirrhotic patients with hepatic encephalopathy.
pubmed:affiliation
Laboratory of Neurochemistry, André-Viallet Clinical Research Centre, Hôpital Saint-Luc, Montréal, Québec, Canada.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't